Synthesis of GdFeO3 nanoparticles via low-temperature reverse co-precipitation: the effect of strong agglomeration on the magnetic behavior
https://doi.org/10.17586/2220-8054-2020-11-2-252-259
Аннотация
Gadolinium orthoferrite (GdFeO3) seems to have potential as a dual-modal contrast agent for magnetic resonance imaging (MRI), thus its preparation in the form of ultrafine superparamagnetic nanoparticles is currently of great interest. In this work, nanocrystalline GdFeO3 was successfully synthesized by the heat treatment (750 ◦C, 4 h) of gadolinium and iron(III) hydroxides reversely co-precipitated at low temperature (0 ◦C). Initial and resulting powders were analyzed by EDX, SEM, PXRD, Mossbauer spectroscopy, vibration magnetometry, etc. Gadolinium orthoferrite was¨ formed as isometric nanocrystals with an average size of 23±3 nm, which were strongly agglomerated into clusters of about 200 nm in diameter. It was shown that the individual GdFeO3 nanocrystals are superparamagnetic, but in the cluster form, they exhibit a collective weak ferromagnetic behavior. After ultrasonic-assisted disintegration of GdFeO3 to a colloidal solution form, these clusters remained stable due to their strong agglomeration and low zeta potential value of 1 mV. Thus, it is concluded that the further use of the synthesized GdFeO3 nanoparticles as a basis of MRI contrast agents will be possible only after the suppression of their clustering.
Об авторах
Y. Albadi
Saint Petersburg State Institute of Technology; Al-Baath University
Россия
Россия
K. Martinson
Ioffe Institute
Россия
Россия
A. Shvidchenko
Ioffe Institute
Россия
Россия
I. Buryanenko
Peter the Great St. Petersburg Polytechnic University
Россия
Россия
V. Semenov
Saint Petersburg State University
Россия
Россия
V. Popkov
Ioffe Institute
Россия
Россия
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Рецензия
Для цитирования:
, , , , , . Наносистемы: физика, химия, математика. 2020;11(2):252–259. https://doi.org/10.17586/2220-8054-2020-11-2-252-259
For citation:
Albadi Y., Martinson K.D., Shvidchenko A.V., Buryanenko I.V., Semenov V.G., Popkov V.I. Synthesis of GdFeO3 nanoparticles via low-temperature reverse co-precipitation: the effect of strong agglomeration on the magnetic behavior. Nanosystems: Physics, Chemistry, Mathematics. 2020;11(2):252–259. https://doi.org/10.17586/2220-8054-2020-11-2-252-259
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